code: def on_epoch_start(self):
      self.data.reset()
  
file_path: labml/helpers/labml_helpers/metrics/simple_state.py
imports: from typing import Generic, TypeVar, Optional
  from .None import StateModule
label_desc: Use image node_id 6 for calling the SimpleStateModule obj's underlying member method code with example usage: obj.on_epoch_start() without return types